erin has a great sense of design, is a really cool kid. >> his fourth child is lisa brennan-jobs, the daughter jobs had with his girlfriend in 1978 and neglected for more than a decade until she moved in with the family as a teenager. isaacson said their reconciliation was important to jobs because his own birth parents had abandoned him. >> he felt there was a hole. he felt something was missing. >> in 1986, he began searching for his biological mother and found joanne schieble simpson living in los angeles. >> did she know that her son, the son that she gave up, was steve jobs? >> no, but she says to him, "there's one thing that i have to tell you: you have a sister. and the sister i raised, we did not put up for adoption. and i must tell her 'cause i've never told this." and the sister turns out to be mona simpson, the novelist. and mona simpson and steve jobs totally bond. separated at birth, as they say. and then they go on a quest, a journey, to find their birth father. especially mona wants to find what she calls the lost father. >> eventually they locate abdul fattah "john" ja